Switch for controlling current flow in superconductors
AssigneeRailway Technical Research Institute
InventorKaoru Nemoto
Life of this patent
Estimating the term…
Abstract
A superconductive switch is provided with a pair of superconductive routes which are wound around a cylindrical core in a bifilar fashion. One superconductive wire is constituted of a pair of superconductive routes. The superconductive routes are twisted around each other at a uniform pitch. By virtue of the twisting, electromagnetic force which may exerted in the superconductive wires cancel each other, so that the wire-movement of the superconductive wire is restrained. Accordingly, the electrical current flowing through the superconductive switch can be increased.
Claims26
A superconductive switch comprising:
- at least one pair of superconductive routes constituting a loop in a superconducting wire wound around a core and having members of the pair of superconductive routes twisted around each other, said at least one pair of superconductive routes having electric current flowing and reciprocating in opposite directions through the respective superconductive routes.
A superconductive switch according to claim 13, wherein said core is manufactured of quartz-glass-fiber reinforced plastic material.
A superconductive switch comprising:
- at least one pair of superconductive routes wound around a core in a bifilar fashion, characterized in that the superconductive routes are twisted around each other.
A method for producing a superconductive switch, the method comprising the steps of:
- (a) preparing at least one superconducting wire;
- (b) twisting said prepared superconductive wire so as to form at least one pair of superconductive routes, the superconductive routes constituting a loop in a superconducting wire and having electric current flowing and reciprocating in opposite directions through the respective superconductive routes;
- and
- (c) winding said superconducting wire around a core.
A superconductive switch comprising:
- at least one pair of superconductive routes constituting a loop in a superconducting wire wound around a core and having electric current flowing and reciprocating in opposite directions through the respective superconductive routes, the superconductive routes being restrained by a mechanical restraining means which restrains movement of the respective superconductive routes.
A superconductive switch comprising:
- at least one pair of superconductive routes wound around a core, the superconductive routes constituting a loop in a superconducting wire and having electric current flowing and reciprocating in opposite directions through the respective superconductive routes, wherein said core is manufactured of a material in which the thermal-shrinkage ratio is less than that of the superconductive wire.
Dependencies are inferred from the claim text.